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Morpholine I

2019-05-21
Morpholine is an important fine chemical used in rubber vulcanization accelerators NOBS and OTOS, rust inhibitors, preservatives, detergents, descaling agents, analgesics, local anesthetics, fruit preservatives, textile auxiliaries, etc. Preparation. Widely used in rubber, medicine, pesticides, dyes, coatings and other fields.
The main production methods of morpholine are the diethanolamine method and the diethylene glycol method. The diethanolamine method is a traditional production method, which requires the import of diethanolamine raw materials, high price, low reaction yield, high production cost, and the product is no longer competitive.
The ethylene glycol method is a newly developed morpholine production method in recent years. Diethylene glycol and liquid ammonia are used as raw materials. The process is simple, the conversion rate is high, and the source of diethylene glycol is sufficient. In particular, synthetic ammonia plants use liquid ammonia and hydrogen to develop morpholine. The advantage is that 2/3 domestic manufacturers use this method to produce morpholine.
With the rapid development of China's rubber industry, especially the tire industry, the production of morpholine has been stimulated and promoted. Morpholine has become a popular fine chemical product in China. Many scientific research institutions have carried out a lot of research on their synthetic processes, which has set off a boom in the construction of morpholine in China. At present, morpholine not only has a great leap in the quantity and quality of our products, but also the synthetic process has been improved from the traditional diethanolamine strong acid dehydration method to the widely used diethylene glycol catalyzed hydrogen deaeration method. Some companies' product quality and raw material consumption have reached the international advanced level. However, due to the large number of SMEs, production technology and product quality are still uneven.
At present, the annual production capacity of morpholine in China has reached 8,700 tons. However, due to technical reasons, three of these countries are in a state of suspension or semi-discontinuation. Therefore, the actual production is not large, and many products are imported every year. According to statistics, the total demand for morpholine in China in 2001 reached 7,000 tons to 8,000 tons. In recent years, with the continuous advancement of science and technology, the new use of morpholine has been continuously explored. For example, the continuous development and production of new pesticides and pharmaceutical products. Alkylamine is a research and development stage used in chemical fiber industrial solvents.
Using morpholine as a raw material, it can synthesize various drugs such as analgesics, local anesthetics, sedatives, respiratory system, and vascular stimulators. Morpholine is mainly used for the synthesis of morpholinium, ibuprofen, naproxen, dichloroaniline, sodium phenylacetate and the like. At present, the annual consumption of morpholine in China's pharmaceutical industry is about 800 tons. Since these drugs are traditional drugs, demand is unlikely to increase rapidly, and the demand for morpholine in 2005 is expected to be about 1,100 tons.

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